Eco Heating Systems CB 105 HW, Installation, Service And User Manual

Page: 113 / 147

E93.1803.901 HW 114
Adjustment procedures
Procedure 1: adjust at High Fire
Carry out the next steps:
1. From status screen, press MENU .
→ "Central Heating/ Information/ Settings/ System Test"
2.
Press UP/DOWN ↑↓ to select "System Test" Press CONFIRM
3. Password needed to continue
4. Press CONFIRM to activate the test state.
→ "Test State:
Off "
5. Press UP/DOWN
↑↓ multiple times to select "High Power" → "Test State:
High Power ".
The water heater becomes active, after about 10 seconds, the water heater burns at high fire.
If the water heater
doesn’t start, open screw [2] two turns extra - clockwise
Note: once the test state is active, it is not necessary to press a button, selecting the desired power is sufficient.
Wait a minimum of 10 seconds for the water heater to stabilize before taking combustion readings between
changes and adjustments to the combustion.
For your information, "Fan speed" and "Ionization" are displayed.
6. Measure the O
2
percentage at the flue gas test port on the vent connection.
7. By setting screw [2], adjust the gas valve to obtain the O
2
value of the table in § 19.1.1.
8. To return to the status screen, and stop the water heater, press ESCAPE or MENU 3 times, or RESET
once.
Decrease O
2
O
2
↓
[2]
CO
2
↑
Turn screw [2] right (clockwise)
Increase O
2
O
2
↑
[2]
CO
2
↓
Turn screw [2] left (counterclockwise)
The system test automatically stops after 10 minutes, after this the system continues with normal demand handling.
When the system test mode is changed during an active system test, the 10-minute timer is restarted.
Procedure 2: adjust at Low Fire
Carry out the next steps:
1. Press UP/DOWN
↑↓ multiple times to select "Low Power" → "Test State:
Low Power ".
After about 10 seconds, the water heater burns at low fire.
2. Measure the O
2
percentage at the flue gas test port on the vent connection.
3. By setting screw [1], adjust the gas valve to obtain the O
2
value of the table in § 19.1.1.
Decrease O
2
O
2
↓
[1]
CO
2
↑
Turn screw [1] right (clockwise)
Increase O
2
O
2
↑
[1]
CO
2
↓
Turn screw [1] left (counterclockwise)
4. To return to the status screen, and stop the water heater, press ESCAPE or MENU 3 times, or RESET
once.
The system test automatically stops after 10 minutes, after this the system continues with normal demand handling.
When the system test mode is changed during an active system test, the 10-minute timer is reloaded.
Repeat procedures 1 and 2 until measured values match table in § 19.1.1. values best
Venturi Replacement Adjustment
A new venturi is shipped with an unknown setting. It must be adjusted before it can be used in the water heater.
•
First, turn setting screw [2] on the venturi clockwise until you feel resistance. This means that the valve is open,
do not try to tighten the screw any further .
•
Now turn screw [2] counterclockwise 38 turns.
After this, perform adjustments according to 19.2.